Predictors of change in disability at three months (R2 = 0.49) and 12 months (R2 = 0.47): results of the multiple linear regression analyses
| 3 Months (n = 157) | 12 Months (n = 151) | |||||||
|---|---|---|---|---|---|---|---|---|
| n | b* | 95% CI | p Value | n | b* | 95% CI | p Value | |
| *b positive: favourable change in disability since baseline per unit of the independent predictor; b negative: unfavourable change in disability since baseline per unit of the independent predictor. | ||||||||
| †Higher score means less social support. | ||||||||
| b, regression coefficient; CI, confidence interval. | ||||||||
| Sociodemographic factors | ||||||||
| Employed (v unemployed) | 95 | 5.43 | (1.26 to 9.61) | 0.01 | ||||
| No children (v having children) | 80 | 4.96 | (0.98 to 8.93) | 0.01 | ||||
| Baseline score | ||||||||
| More severe pain (per point increase) | 157 | −1.88 | (−3.13 to −0.63) | 0.00 | 150 | −1.37 | (−2.99 to 0.25) | 0.10 |
| More disabled (per point increase) | 156 | 0.58 | (0.45 to 0.72) | 0.00 | 151 | 0.71 | (0.54 to 0.87) | 0.00 |
| Characteristics of complaint | ||||||||
| Duration of current episode: | ||||||||
| <1 week | 8 | 0.00 | 7 | 0.00 | ||||
| 1 week to 1 month | 44 | −8.67 | (−19.40 to 2.06) | 0.11 | 42 | −10.10 | (−23.94 to 3.73) | 0.15 |
| 1 month to 6 months | 66 | −9.10 | (−19.44 to 1.25) | 0.08 | 64 | −11.30 | (−24.87 to 2.27) | 0.10 |
| >6 months | 36 | −12.18 | (−23.07 to −1.28) | 0.03 | 36 | −14.84 | (−29.14 to −0.53) | 0.04 |
| History of complaints (v no history) | 83 | −9.77 | (−15.97 to −3.57) | 0.00 | ||||
| Putative cause: accident (v “no”) | 13 | 8.58 | (1.09 to 16.07) | 0.03 | ||||
| Putative cause: chronic disease (v “no”) | 10 | −10.07 | (−21.27 to 1.12) | 0.08 | ||||
| Comorbidity | ||||||||
| Complaints at hip/knee (v “no”) | 37 | −9.21 | (−16.04 to −2.38) | 0.01 | ||||
| Multiple musculoskeletal complaints (v “no”) | 24 | −9.66 | (−15.56 to −3.77) | 0.00 | ||||
| Psychosocial factors | ||||||||
| Coping: more retreating (per point increase) | 155 | −0.88 | (−1.42 to −0.34) | 0.00 | 150 | −0.92 | (−1.72 to −0.12) | 0.03 |
| Coping: worrying (per point increase) | 150 | −0.68 | (−1.33 to −0.03) | 0.04 | ||||
| Social support† | ||||||||
| low | 51 | 0.00 | ||||||
| medium | 69 | −4.69 | (−9.38 to 0.01) | 0.05 | ||||
| high | 35 | −2.78 | (−8.50 to 2.94) | 0.34 | ||||